| 多层螺旋雾幕技术的喷雾模拟及降尘试验研究 |
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| 引用本文： | 荆德吉,徐放,葛少成,张天,孟祥曦.多层螺旋雾幕技术的喷雾模拟及降尘试验研究[J].中国安全生产科学技术,2019,15(8):70-76. |
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| 作者姓名： | 荆德吉 徐放 葛少成 张天 孟祥曦 |
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| 作者单位： | （1.辽宁工程技术大学 安全科学与工程学院，辽宁 阜新 123000；2.辽宁工程技术大学 安全科学与工程研究院，辽宁 阜新 123000;3.矿山热动力灾害与防治教育部重点实验室（辽宁工程技术大学），辽宁 阜新 123000；4.太原理工大学 安全与应急管理工程学院，山西 太原 030024） |
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| 基金项目： | * 基金项目: 国家自然科学基金青年科学基金项目（51704146） |
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| 摘 要： | 为了解决掘进工作面传统喷雾除尘无法有效抑制粉尘扩散的问题，提出了一种将气动喷嘴呈螺旋状布置的多层螺旋雾幕除尘方法。采用k-ω湍流模型与K-H液滴破碎模型，通过Comsol多物理场耦合数值模拟，得出了多层螺旋雾幕速度场分布和粒子轨迹的变化规律，结合模拟结果搭建试验平台，并将多层螺旋雾幕与传统喷雾的除尘效果进行对比分析。以2层雾幕为例的模拟结果显示，喷雾2 s时就会形成明显的2层螺旋状雾幕，10 s后旋转水雾充满整个模拟区域，并且雾滴粒径较传统喷雾更小。试验表明多层螺旋雾幕的除尘效果明显强于自然降尘与传统喷雾，3 min后可将浓度470 mg/m3左右的粉尘降到4 mg/m3以下。
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| 关 键 词： | 多层雾幕 喷雾除尘 喷雾模拟 粒子轨迹 |
Study on spray simulation and dust removal experiments of multi layer spiral fog curtain technology |
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| JING Deji,,' target="_blank" rel="external">,XU Fang,,' target="_blank" rel="external">,GE Shaocheng,ZHANG Tian,,' target="_blank" rel="external">,MENG Xiangxi,,' target="_blank" rel="external">.Study on spray simulation and dust removal experiments of multi layer spiral fog curtain technology[J].Journal of Safety Science and Technology,2019,15(8):70-76. |
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| Authors: | JING Deji " target="_blank">' target="_blank" rel="external"> XU Fang " target="_blank">' target="_blank" rel="external"> GE Shaocheng ZHANG Tian " target="_blank">' target="_blank" rel="external"> MENG Xiangxi " target="_blank">' target="_blank" rel="external"> |
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| Affiliation: | (1.College of Safety Science and Engineering,Liaoning Technical University,Fuxin Liaoning 123000,China;2.Research Institute of Safety Science and Engineering,Liaoning Technical University,Fuxin Liaoning 123000,China;3.Key Laboratory of Mine Thermodynamic Disasters and Control of Ministry of Education (Liaoning Technical University),Fuxin Liaoning 123000,China;4.College of Safety and Emergency Management Engineering,Taiyuan University of Technology,Taiyuan Shanxi 030024,China) |
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| Abstract: | In order to solve the problem that the traditional spray dust removal can’t effectively suppress the dust diffusion in the tunneling face,a dust removal method of multi layer spiral fog curtain was proposed,in which the pneumatic nozzle was arranged as the spiral shape.The k ω turbulence model and the K-H droplet fracture model were used to simulate the velocity field distribution and change laws of particle trajectory of the multi layer spiral fog curtain through the Comsol multiphysics coupled numerical simulation.Combined with the simulation results,an experimental platform was established,and the dust removal effect of multi layer spiral fog curtain was compared with that of traditional spray.The simulation results of two layer fog curtain showed that a two layered spiral mist curtain formed after spraying for 2 seconds.After 10 seconds,the rotating water fog filled the whole simulation area,and the droplet size of fog was smaller than that of the traditional spray.The experiments showed that the dust removal effect of the multi layer spiral fog curtain was obviously stronger than those of natural dust reduction and the traditional spray.After 3 minutes,the dust concentration of about 470 mg/m3 could be reduced to below 4 mg/m3. |
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| Keywords: | multi layer fog curtain spray dust removal spray simulation particle trajectory |
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